diff --git a/source/dub/compilers/buildsettings.d b/source/dub/compilers/buildsettings.d
index 3da87b1..0e9a1ce 100644
--- a/source/dub/compilers/buildsettings.d
+++ b/source/dub/compilers/buildsettings.d
@@ -12,8 +12,7 @@
 import std.array : array;
 import std.algorithm : filter;
 import std.path : globMatch;
-static if (__VERSION__ >= 2067)
-	import std.typecons : BitFlags;
+import std.typecons : BitFlags;
 
 
 /// BuildPlatform specific settings, like needed libraries or additional
@@ -284,26 +283,9 @@
 	struct BuildRequirements {
 		import dub.internal.vibecompat.data.serialization : ignore;
 
-		static if (__VERSION__ >= 2067) {
-			@ignore BitFlags!BuildRequirement values;
-			this(BuildRequirement req) { values = req; }
-		} else {
-			@ignore BuildRequirement values;
-			this(BuildRequirement req) { values = req; }
-			BuildRequirement[] toRepresentation()
-			const {
-				BuildRequirement[] ret;
-				for (int f = 1; f <= BuildRequirement.max; f *= 2)
-					if (values & f) ret ~= cast(BuildRequirement)f;
-				return ret;
-			}
-			static BuildRequirements fromRepresentation(BuildRequirement[] v)
-			{
-				BuildRequirements ret;
-				foreach (f; v) ret.values |= f;
-				return ret;
-			}
-		}
+		@ignore BitFlags!BuildRequirement values;
+		this(BuildRequirement req) { values = req; }
+
 		alias values this;
 	}
 
@@ -340,27 +322,9 @@
 	struct BuildOptions {
 		import dub.internal.vibecompat.data.serialization : ignore;
 
-		static if (__VERSION__ >= 2067) {
-			@ignore BitFlags!BuildOption values;
-			this(BuildOption opt) { values = opt; }
-			this(BitFlags!BuildOption v) { values = v; }
-		} else {
-			@ignore BuildOption values;
-			this(BuildOption opt) { values = opt; }
-			BuildOption[] toRepresentation()
-			const {
-				BuildOption[] ret;
-				for (int f = 1; f <= BuildOption.max; f *= 2)
-					if (values & f) ret ~= cast(BuildOption)f;
-				return ret;
-			}
-			static BuildOptions fromRepresentation(BuildOption[] v)
-			{
-				BuildOptions ret;
-				foreach (f; v) ret.values |= f;
-				return ret;
-			}
-		}
+		@ignore BitFlags!BuildOption values;
+		this(BuildOption opt) { values = opt; }
+		this(BitFlags!BuildOption v) { values = v; }
 
 		alias values this;
 	}
diff --git a/source/dub/dependencyresolver.d b/source/dub/dependencyresolver.d
index 6b42d80..f5e9dcb 100644
--- a/source/dub/dependencyresolver.d
+++ b/source/dub/dependencyresolver.d
@@ -43,7 +43,6 @@
 
 		hash_t toHash() const nothrow @trusted {
 			size_t ret = pack.hashOf();
-			//size_t ret = typeid(string).getHash(&pack);
 			ret ^= typeid(CONFIG).getHash(&config);
 			return ret;
 		}
diff --git a/source/dub/description.d b/source/dub/description.d
index 9f519cb..c9c347c 100644
--- a/source/dub/description.d
+++ b/source/dub/description.d
@@ -44,10 +44,7 @@
 		foreach (ref p; packages)
 			if (p.name == name)
 			{
-				static if (__VERSION__ > 2065)
-					return p;
-				else
-					return *cast(inout(PackageDescription)*)&p;
+				return p;
 			}
 		throw new Exception("Package '"~name~"' not found in dependency tree.");
 	}
diff --git a/source/dub/internal/sdlang/lexer.d b/source/dub/internal/sdlang/lexer.d
index 2295ed7..d57a187 100644
--- a/source/dub/internal/sdlang/lexer.d
+++ b/source/dub/internal/sdlang/lexer.d
@@ -1,4 +1,4 @@
-// SDLang-D
+// SDLang-D
 // Written in the D programming language.
 
 module dub.internal.sdlang.lexer;
@@ -1259,8 +1259,7 @@
 				else
 				{
 					auto timezone = new immutable SimpleTimeZone(offset.get());
-					static if (__VERSION__ >= 2067) auto fsecs = dateTimeFrac.fracSecs;
-					else auto fsecs = FracSec.from!"hnsecs"(dateTimeFrac.fracSecs.total!"hnsecs");
+					auto fsecs = dateTimeFrac.fracSecs;
 					mixin(accept!("Value", "SysTime(dateTimeFrac.dateTime, fsecs, timezone)"));
 				}
 			}
@@ -1268,9 +1267,8 @@
 			try
 			{
 				auto timezone = PosixTimeZone.getTimeZone(timezoneStr);
-				if(timezone) {
-					static if (__VERSION__ >= 2067) auto fsecs = dateTimeFrac.fracSecs;
-					else auto fsecs = FracSec.from!"hnsecs"(dateTimeFrac.fracSecs.total!"hnsecs");
+				if (timezone) {
+					auto fsecs = dateTimeFrac.fracSecs;
 					mixin(accept!("Value", "SysTime(dateTimeFrac.dateTime, fsecs, timezone)"));
 				}
 			}
diff --git a/source/dub/internal/sdlang/token.d b/source/dub/internal/sdlang/token.d
index b5f8f4a..ca1ef64 100644
--- a/source/dub/internal/sdlang/token.d
+++ b/source/dub/internal/sdlang/token.d
@@ -1,4 +1,4 @@
-// SDLang-D
+// SDLang-D
 // Written in the D programming language.
 
 module dub.internal.sdlang.token;
@@ -247,10 +247,7 @@
 
 void toSDLString(Sink)(SysTime value, ref Sink sink) if(isOutputRange!(Sink,char))
 {
-	static if (__VERSION__ >= 2067)
-		auto dateTimeFrac = DateTimeFrac(cast(DateTime)value, value.fracSecs);
-	else
-		auto dateTimeFrac = DateTimeFrac(cast(DateTime)value, value.fracSec);
+	auto dateTimeFrac = DateTimeFrac(cast(DateTime)value, value.fracSecs);
 	toSDLString(dateTimeFrac, sink);
 
 	sink.put("-");
@@ -286,12 +283,7 @@
 			sink.put("+");
 
 		long hours, minutes;
-		static if (__VERSION__ >= 2066)
-			offset.split!("hours", "minutes")(hours, minutes);
-		else {
-			hours = offset.hours;
-			minutes = offset.minutes;
-		}
+		offset.split!("hours", "minutes")(hours, minutes);
 
 		sink.put("%.2s".format(hours));
 		sink.put(":");
@@ -326,14 +318,7 @@
 	}
 
 	long hours, minutes, seconds, msecs;
-	static if (__VERSION__ >= 2066)
-		value.split!("hours", "minutes", "seconds", "msecs")(hours, minutes, seconds, msecs);
-	else {
-		hours = value.hours;
-		minutes = value.minutes;
-		seconds = value.seconds;
-		msecs = value.fracSec.msecs;
-	}
+	value.split!("hours", "minutes", "seconds", "msecs")(hours, minutes, seconds, msecs);
 
 	sink.put("%.2s".format(hours));
 	sink.put(':');
diff --git a/source/dub/internal/vibecompat/core/file.d b/source/dub/internal/vibecompat/core/file.d
index 0dcbe14..404cd87 100644
--- a/source/dub/internal/vibecompat/core/file.d
+++ b/source/dub/internal/vibecompat/core/file.d
@@ -216,9 +216,7 @@
 */
 FileInfo getFileInfo(Path path)
 {
-	static if (__VERSION__ >= 2064)
-		auto ent = std.file.DirEntry(path.toNativeString());
-	else auto ent = std.file.dirEntry(path.toNativeString());
+	auto ent = std.file.DirEntry(path.toNativeString());
 	return makeFileInfo(ent);
 }
 /// ditto
diff --git a/source/dub/internal/vibecompat/data/json.d b/source/dub/internal/vibecompat/data/json.d
index a2705a3..c352bf3 100644
--- a/source/dub/internal/vibecompat/data/json.d
+++ b/source/dub/internal/vibecompat/data/json.d
@@ -2102,15 +2102,13 @@
 
 private void enforceJson(string file = __FILE__, size_t line = __LINE__)(bool cond, lazy string message = "JSON exception")
 {
-	static if (__VERSION__ >= 2065) enforceEx!JSONException(cond, message, file, line);
-	else if (!cond) throw new JSONException(message);
+	enforceEx!JSONException(cond, message, file, line);
 }
 
 private void enforceJson(string file = __FILE__, size_t line = __LINE__)(bool cond, lazy string message, string err_file, int err_line)
 {
 	auto errmsg() { return format("%s(%s): Error: %s", err_file, err_line+1, message); }
-	static if (__VERSION__ >= 2065) enforceEx!JSONException(cond, errmsg, file, line);
-	else if (!cond) throw new JSONException(errmsg);
+	enforceEx!JSONException(cond, errmsg, file, line);
 }
 
 private void enforceJson(string file = __FILE__, size_t line = __LINE__)(bool cond, lazy string message, string err_file, int* err_line)
diff --git a/source/dub/internal/vibecompat/data/serialization.d b/source/dub/internal/vibecompat/data/serialization.d
index 0c051e2..0f9b7c4 100644
--- a/source/dub/internal/vibecompat/data/serialization.d
+++ b/source/dub/internal/vibecompat/data/serialization.d
@@ -196,7 +196,7 @@
 }
 
 ///
-static if (__VERSION__ >= 2065) unittest {
+unittest {
 	import dub.internal.vibecompat.data.json;
 
 	static struct SizeI {
@@ -266,7 +266,7 @@
 }
 
 ///
-static if (__VERSION__ >= 2065) unittest {
+unittest {
 	import dub.internal.vibecompat.data.json;
 
 	static struct SizeI {
@@ -292,7 +292,7 @@
 private void serializeImpl(Serializer, alias Policy, T, ATTRIBUTES...)(ref Serializer serializer, T value)
 {
 	import std.typecons : Nullable, Tuple, tuple;
-	static if (__VERSION__ >= 2067) import std.typecons : BitFlags;
+	import std.typecons : BitFlags;
 
 	static assert(Serializer.isSupportedValueType!string, "All serializers must support string values.");
 	static assert(Serializer.isSupportedValueType!(typeof(null)), "All serializers must support null values.");
@@ -356,7 +356,7 @@
 	} else static if (/*isInstanceOf!(Nullable, TU)*/is(T == Nullable!TPS, TPS...)) {
 		if (value.isNull()) serializeImpl!(Serializer, Policy, typeof(null))(serializer, null);
 		else serializeImpl!(Serializer, Policy, typeof(value.get()), ATTRIBUTES)(serializer, value.get());
-	} else static if (__VERSION__ >= 2067 && is(T == BitFlags!E, E)) {
+	} else static if (is(T == BitFlags!E, E)) {
 		size_t cnt = 0;
 		foreach (v; EnumMembers!E)
 			if (value & v)
@@ -450,7 +450,7 @@
 private T deserializeImpl(T, alias Policy, Serializer, ATTRIBUTES...)(ref Serializer deserializer)
 {
 	import std.typecons : Nullable;
-	static if (__VERSION__ >= 2067) import std.typecons : BitFlags;
+	import std.typecons : BitFlags;
 
 	static assert(Serializer.isSupportedValueType!string, "All serializers must support string values.");
 	static assert(Serializer.isSupportedValueType!(typeof(null)), "All serializers must support null values.");
@@ -496,7 +496,7 @@
 	} else static if (isInstanceOf!(Nullable, T)) {
 		if (deserializer.tryReadNull()) return T.init;
 		return T(deserializeImpl!(typeof(T.init.get()), Policy, Serializer, ATTRIBUTES)(deserializer));
-	} else static if (__VERSION__ >= 2067 && is(T == BitFlags!E, E)) {
+	} else static if (is(T == BitFlags!E, E)) {
 		T ret;
 		deserializer.readArray!(E[])((sz) {}, {
 			ret |= deserializeImpl!(E, Policy, Serializer, ATTRIBUTES)(deserializer);
@@ -1276,7 +1276,6 @@
 	assert(s.serializeToJson().deserializeJson!S() == s);
 }
 
-static if (__VERSION__ >= 2067)
 unittest { // test BitFlags serialization
 	import std.typecons : BitFlags;
 
diff --git a/source/dub/internal/vibecompat/inet/path.d b/source/dub/internal/vibecompat/inet/path.d
index f5bd81f..68cd513 100644
--- a/source/dub/internal/vibecompat/inet/path.d
+++ b/source/dub/internal/vibecompat/inet/path.d
@@ -34,8 +34,7 @@
 	/// Constructs a Path object by parsing a path string.
 	this(string pathstr)
 	{
-		static if (__VERSION__ < 2066) m_nodes = splitPath(pathstr).idup;
-		else m_nodes = splitPath(pathstr);
+		m_nodes = splitPath(pathstr);
 		m_absolute = (pathstr.startsWith("/") || m_nodes.length > 0 && (m_nodes[0].toString().countUntil(':')>0 || m_nodes[0] == "\\"));
 		m_endsWithSlash = pathstr.endsWith("/");
 	}